SS - Statistics & Probability - Study Guide

Sometimes, information is taken from a subset of a population and that information is applied to the entire population. In order for this information to accurately represent the population, the sample should be

• large

• random

• at least 100

• biased

Amy and Brian want to collect data to find out the favorite after school activities of 7^th grade students at Thompkins Middle School. Which group of people should Lindsay and Justin survey to achieve the most accurate results?

• ten people that eat breakfast in the cafeteria

• two boys and two girls from 1st period math class

• Random sample of football players

• Random sample of 7th grade students

About how many of the votes did olivia receive?

• one-fourth

• half

• two-third

• three-fourths

Which orchard produces the most flies?

• Grapefruit

• Orange

• Tangerine

• Lemon

What is the range and how is it found?

• 10: it is the lowest number

• 50: 60-10

• 60: it is the highest number

• 60: 60-0

In a set of data, how is the median found?

• add all the numbers together then divide by the number of data points

• find the middle number

• put the numbers in order then find the middle number

• add all the numbers together and divide by 1

In a set of data, how is the mean found?

• add all the numbers together then divide by the number of data points

• find the middle number

• put the numbers in order then find the middle number

• add all the numbers together and divide by 1

What is the median score? The mean score?

• 30, 40

• 40, 30

• 40, 15

• 35, 30

What is the median score? The mean score?

• 30, 40

• 40, 30

• 40, 15

• 35, 30

What are the steps to finding probability?

• put the numbers in order, find the middle number

• subtract the lowest from the highest

• find the average